November 2025 was colder and much wetter than usual too. The average maximum temperature of 10.3°C was 0.7°C below the Usk average for November of 11.0°C. There were no air frosts, the lowest temperature recorded being 0.6°C on the 20th. Maximum temperatures ranged between 15.2°C on the 6th and 4.3°C on the 20th.
Measurable rain was recorded on 24 days and there were 4 days when over 10 mm was recorded, the wettest being the 14th when 49.2 mm fell. The total rainfall of 212.4 mm was 87% above the Usk* average for November of 113.7 mm, making this the wettest November in Penallt since records began in 2011.
October 2025 was colder and a little drier than usual. The average maximum temperature of 13.3°C was 1.7°C below the Usk average for October of 15.0°C. Conversely, the average minimum of 8.1°C was 1.7°C above the Usk average for October of 6.4°C, reflecting the large number of cloudy nights in the month. There were no particularly warm days at all, the 5th being the best with a maximum of 18.9°C
There were sixteen days on which no significant rain was recorded overall. The total rainfall of 117.2 mm was 1.7% below the Usk* average for October of 126.3 mm. The wettest day was the 19th when 33.8 mm rain was recorded.
September 2025 was the second coldest and third wettest since records began in 2011. The total rainfall was 117.0 mm, 44% above the Usk* average for September of 81.2 mm. There were 11 dry days (rainfall of 0.2 mm or below). The wettest day was the 14th, when 21.8 mm fell.
There were only two days when the temperature exceeded 20 °C. Overall, the mean maximum temperature of 16.9°C was 2.3 °C below the Usk average for September of 19.2°C. The highest was 21.2°C on the 6th and the lowest of 13.3°C occurred on the 21st. Night time minima were average overall (9.1°C as opposed to 9.1°C !).
August 2025 was of average temperature overall but, despite a late wet spell, much drier than average. The total rainfall of 36.0 mm was 49% of the Usk* average for August of 73.9 mm and there were 23 days on which no significant rain (>0.2 mm) fell. The wettest day was the 30th when 13.4 mm fell.
The average maximum temperature of 22.1 °C was identical to the Usk average for August of 22.1 °C. The warmest day was the 12th (31.3 °C), one of five days on which the temperature reached 25 °C.
Meteorological summer (Jun/July/August) has been the second driest since Penallt records began in 2011, with total rainfall being 66% of the Usk mean, “beaten” only by the dry summer of 2022 (49%).
The average maximum summer temperature of 22.3 °C makes this the third warmest Penallt summer since 2011, exceeded only by 2022 (22.7 °C) and 2018 (22.9 °C). A similar result is obtained when mean temperatures are considered:
July 2025 was warmer than usual and had roughly average rainfall overall. The total rainfall of 59.4 mm was 95% of the Usk* average for July of 62.6 mm. There were 22 days on which no measurable rain fell and little rain fell on other days except for the 20th (17.8 mm) and the 31st (24.8 mm). The latter was notable for a cloudburst between 2.30 pm and 2.45 pm approx when some 20 mm fell.
The average maximum temperature of 23.3 °C was 1.0 °C above the Usk average for July of 22.3 °C; there were five days when the temperature rose above 25 °C, and there was an official heat wave (3 days with temps above 26 °C) between the 9th and the 12th (27.2 °C, 29.3 °C, 32.1 °C and 30.9 °C). The coldest day was the 15th (max of 16.3 °C).
June 2025 was much warmer and a little drier than usual.
The average maximum temperature of 21.6°C was 1.3°C above the Usk* average for June of 20.3°C, this being boosted by an official heatwave (18th to 21st) when the maximum temperature was 26°C or above for at least three consecutive days (4 days in this case). The temperature peaked at 29.4°C on the 19th and reached 29.2°C on the 21st and 30th also.
The highest June temperature recorded since records began in Penallt in 2011 was 30.8°C (19th and 21st in 2017), closely followed by 30.7°C on the 29th in 2019 and the 25th in 2020. This June was the third warmest on record, beaten by 2023 (22.8°C) and 2018 (22.2°C).
June had only 2 very wet days (> 10mm) and the Penallt total rainfall was 51.2 mm, 85% of the Usk* June average of 60.2 mm. The wettest day was the 5th, with a fall of 11.4 mm. There were 19 days in the month when no measurable rain fell too. Overall, this was the seventh driest June on record in Penallt, the driest being 2018 when 16.0 mm were recorded.
May 2025 was much drier than usual and included 25 days on which no significant rain fell. The total rainfall of 15.8 mm was 22% of the Usk* average for May of 71.5 mm.
It was the second driest May since Penallt records began in 2011, only beaten by the 6.2 mm recorded in 2020.
The meteorological Spring period of March, April and May was by some way the driest on record. The total of 80.8 mm was 36% of the Usk average and was nearly five times less than the 2024 record of 388.0 mm for this period.
Maximum temperatures exceeded 20°C on 11 days with a high of 26.5°C on the 1st. The lowest maximum was 12.3°C on the 4th. Overall, the average maximum temperature of 18.3°C was 0.8°C above the Usk average for May of 17.5°C, making it the third warmest May since 2011 (2018 and 2020 both had average maxima of 19.0°C).
The average minimum temperature was 8.3°C, 1.6°C above the Usk value of 6.7°C.
April 2025 was drier and much warmer than usual.
Overall, the average maximum temperature of 16.1°C was 2.1°C above the Usk average for April of 14.0°C with a peak of 24.3°C on the 30th. This was the third warmest April day in Penallt since records began in 2011. [2018 saw the warmest April day with a peak of 25.5°C on the 19th]. The minimum temperature was 1.1°C on the 10th and there were no days of air frost. It was the third warmest April in Penallt in the last 15 years, beaten by 2011 and 2020.
There were 21 days when no rain (or a trace) fell, the wettest day being 23rd when 17.2 mm fell. It was drier than usual overall with the total rainfall of 67.5 mm being 84% of the Usk* average for April of 67.5 mm.
March 2025 was reported by the Met Office as the driest March in Wales since 1944. Penallt was no exception to this as the total rainfall was 8.0 mm, just under 10% of the Usk* average for March of 83.1 mm. It was the driest March since records began in Penallt in 2011, and the third driest month beaten only by April 2011 (5.0 mm) and May 2020 (6.2 mm).
There were 4 days on which rain fell (>0.2 mm), the wettest being the 21st with 3.4 mm.
It was a little warmer than usual too. Overall, the average maximum temperature of 11.8°C was 0.7°C above the Usk average for March of 11.1°C. The coldest by day was the 12th, with a maximum of 2.8°C, and the warmest was the 20th with a maximum of 18.4°C. There were no days when the minimum fell below zero.
February 2025 was colder than average and had much the same rainfall as usual overall. The month had five frosty mornings, the coldest overnight being -1.5°C on the 28th. Overall, the average maximum temperature of 6.9°C was 1.6°C below the Usk average for February of 8.5°C with a maximum of 12.6°C on the 20th.
The average minimum temperature was 2.3°C (1.1°C above expected), a reflection on the continuous cloud cover during the month, broken only by the appearance of blue skies on the last few days which allowed colder nights.
There were 13 days on which no significant rain (0.2 mm or less) fell, and a total monthly rainfall of 82.0 mm was 94% of the Usk* average for February of 87.4 mm. The wettest day was the 23rd with 32.2 mm.
January 2025 was much colder and wetter than usual. The average maximum temperature of 6.1°C was 2.0°C below the Usk average for January of 8.1°C. The minimum temperature sank below 0°C on seventeen days. The warmest day was the 5th (max = 11.2°C) and the coldest was the 4th with a maximum of 1.3°C.
The measured rainfall was 181.1 mm, was 42% above the Usk* average for January of 127.6 mm. Rain was measured on 12 days in the month, the wettest being the 5th when 38.4 mm fell. There was a period of 15 consecutive days without rain between the 8th and the 22nd inclusive.
Click the button below for an Excel file giving daily data for 2025:-
* Usk is the nearest Met Office station for which long term averages (1981-2010) are available.